Updates are available Correction dated 2018-11-19

Article History

Received: 30 September 2015

Revised: 24 December 2015

Accepted: 7 January 2016

First Online: 26 January 2016

Change Date: 19 November 2018

Change Type: Correction

Change Date: 19 November 2018

Change Type: Correction

Change Details: The original version of this article unfortunately contained a mistake. The presentation of the author names was incorrect. The correct information is given here.

Change Details: The original version of this article unfortunately contained a mistake. The presentation of the author names was incorrect. The correct information is given here.

Compliance with Ethical Standards

:

: Alex Khoo Cheen Hoe and Lee Yeong Fong declare that they have no conflict of interest.

: The study was approved by an institutional review board or equivalent and has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. The subject in the study gave written informed consent.